zpsd211r STMicroelectronics, zpsd211r Datasheet - Page 14

• Manufacturer Part Number: zpsd211r
• Description: Low Cost Field Programmable Microcontroller Peripherals
• Manufacturer: STMicroelectronics

Programmable
Address
Decoder (PAD)
(cont.)
Table 4. PSD211R PAD A and PAD B Functions
PAD A and PAD B Inputs
PAD A Outputs
PAD B Outputs
CSIOPORT
CS8–CS10
WR or R/W
CS0–CS3
CS4 –CS7
ES0–ES7
A16–A18
A11–A15
A19/CSI
ALE/AS
RESET
RD/E
In CSI mode (when high), PAD deselects all of its outputs and enters a
power-down mode (see Tables 7A and 7B). In A19 mode, it is another
input to the PAD.
These are general purpose inputs from Port C. See Figure 4, Note 3.
These are address inputs.
This is the read pulse or enable strobe input.
This is the write pulse or R/W select signal.
This is the ALE or AS input to the chip.
This deselects all outputs from the PAD; it can not be used in product
term equations. See Tables 8A and 8B.
These are internal chip-selects to the 8 EPROM banks. Each bank can
be located on any boundary that is a function of one product term of the
PAD address inputs.
This internal chip-select selects the I/O ports. It can be placed on any
boundary that is a function of one product term of the PAD inputs. See
Table 5.
These chip-select outputs can be routed through Port B. Each of them is
a function of up to four product terms of the PAD inputs.
These chip-select outputs can be routed through Port B. Each of them is
a function of up to two product terms of the PAD inputs.
These chip-select outputs can be routed through Port C. See Figure 4,
Note 3. Each of them is a function of one product term of the PAD inputs.
Function
PSD211R Family
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